I-PAC 22 Side Outlet Inverter Heat Pump 22kW | Extended Summer Season | 1-Phase

Transform your hot tub or spa into a year-round sanctuary of warmth and relaxation. The I-PAC 22 (IPT22ALX) represents the pinnacle of modern pool heating technology, delivering powerful 22kW heating capacity with whisper-quiet operation and remarkable energy efficiency. Designed specifically for the UK climate by Dantherm, this premium inverter heat pump combines cutting-edge performance with eco-friendly credentials.

Energy Efficiency That Saves You Money With an exceptional average COP (Coefficient of Performance) of 9.6 at 50% speed, the I-PAC 22 delivers up to twice the efficiency of traditional on/off heat pumps. For every 1kW of electricity consumed, you receive up to 13.8kW of heating output—slashing your running costs while maintaining perfect water temperatures.

Ultra-Quiet Operation Experience peace in your outdoor space. The I-PAC 22 achieves a remarkable 9-11 dB(A) sound reduction compared to conventional heat pumps. With innovative Whisper Mode, background noise drops to just 24.9 dB(A) at 10 metres—quieter than rustling leaves. Your relaxation won’t be interrupted by intrusive mechanical noise.

Smart Climate Control from Anywhere Built-in WiFi connectivity puts complete control in your pocket. Adjust temperatures, switch between heating and cooling modes, monitor performance, and ensure your hot tub is perfectly warmed before you arrive home—all from your smartphone or tablet.

Eco-Friendly & Future-Proof Using R32 refrigerant with a low Global Warming Potential (GWP) of 675, the I-PAC 22 meets F-Gas compliance standards while reducing environmental impact. This forward-thinking choice protects both your investment and the planet.

🔥 Powerful Performance Specifications

The I-PAC 22 delivers consistent, reliable heating across varying weather conditions:

Performance Metric	Air 27°C / Water 27°C	Air 15°C / Water 26°C
Heating Capacity	25.0 kW	17.0 kW
COP Range	13.8 – 5.8	7.2 – 4.0
Average COP (50% Speed)	9.6	6.4
Cooling Capacity (35°C air)	9.4 kW	N/A

Extended Operating Range

Air Temperature Range: -5°C to 43°C
Water Temperature Settings:

• Heating Mode: 18°C to 40°C
• Cooling Mode: 12°C to 30°C
• Auto Mode: 12°C to 40°C

This exceptional range means you can enjoy your hot tub from early spring through late autumn—extending your season significantly beyond traditional heaters.

📄 Downloads & Technical Documentation

Access comprehensive technical resources to ensure optimal installation and operation:

📄 Calorex I-PAC Owner & Installation Manual (opens in new tab)
Complete 43-page guide covering installation procedures, electrical requirements, WiFi setup, operating instructions, maintenance schedules, winterization procedures, troubleshooting codes, and warranty terms. Essential reading for installers and owners.

📄 Inverter Heat Pump Technical Brochure (opens in new tab)
Detailed technical specifications, performance data at multiple operating conditions, pool sizing charts for domestic installations, inverter technology explanation, and comparison data between models. Includes visual sizing guides for UK seasonal use.

⚡ Advanced Inverter Technology Explained

What Makes Inverter Technology Superior?

Unlike traditional on/off heat pumps that constantly cycle between full power and standby, the I-PAC 22’s inverter technology continuously adjusts its output to match your exact heating requirements.

Key Benefits:

✅ Precision Temperature Control – The inverter modulates compressor speed from 20% to 100% capacity, maintaining your desired temperature within ±1°C
✅ Dramatically Lower Running Costs – Eliminates energy-wasting on/off cycling for up to 50% energy savings
✅ Smooth Power Consumption – No massive electrical inrush currents that stress your electrical system or trip breakers
✅ Extended Component Lifespan – Gentle ramp-up reduces mechanical wear on the compressor
✅ Faster Heat-Up Times – Boost mode delivers full 25kW output when you need rapid temperature recovery

🔇 Two Operation Modes for Every Situation

Boost Mode 🚀

Best for: Initial heat-up, rapid temperature recovery, colder weather
Heating Capacity: 20% to 100% of rated output
Features: Fastest heating times, intelligent optimization, maximum performance

Use Boost mode when you want your hot tub ready quickly or when dealing with significantly lower starting temperatures.

Whisper Mode 🌙

Best for: Daily maintenance, overnight operation, noise-sensitive environments
Heating Capacity: 20% to 80% of rated output
Sound Level: 3 dB(A) quieter than Boost mode
Features: Near-silent operation, excellent efficiency, ideal for residential areas

Perfect for maintaining temperature during normal use, especially when neighbours are nearby or during evening relaxation.

📊 Complete Technical Specifications

Specification	IPT22ALX
Model Code	IPT22ALX
Series	I-PAC 22 (X-Range)
Outlet Type	Side Outlet
Phase	Single Phase (1ph)
Power Supply	230V / 50Hz
Season Rating	Extended Summer
HEATING PERFORMANCE
Rated Power Output	22kW (8-25kW range)
Rated Input Power	0.69 – 4.25 kW
Rated Input Current	3.16 – 19.32 A
Maximum Input Current	20 A
COP Range (27°C air)	13.8 – 5.8
COP Range (15°C air)	7.2 – 4.0
COOLING PERFORMANCE
Cooling Capacity (35°C)	9.4 kW
WATER CIRCUIT
Recommended Flow Rate	10.0 – 12.0 m³/h
Pressure Drop	0.77 m / 7.5 kPa
Water Connections	1½” or 50mm Female
Heat Exchanger	Titanium Twisted Tube
ELECTRICAL PROTECTION
Rated Fuse Type	aM Type
MCB Type	Type C
Fuse/MCB Rating	25 A
RCD Type	F Type
RCD Rating	30 mA
REFRIGERATION
Refrigerant Type	R32 (Low GWP)
Refrigerant Charge	2.0 kg
Global Warming Potential	675
Compressor Type	DC Inverter (Stepless)
ACOUSTIC PERFORMANCE
Sound Level @ 10m	24.9 – 36.7 dB(A)
Sound Level @ 1m	44.9 – 56.7 dB(A)
Noise Reduction vs On/Off	9 – 11 dB(A)
CONSTRUCTION
Cabinet Material	Premium Aluminium Alloy
Condenser Type	High-Efficiency Titanium
Finish	Corrosion-Resistant
DIMENSIONS & WEIGHT
Unit Dimensions (W×D×H)	1084 × 429 × 948 mm
Packed Dimensions (W×D×H)	1130 × 445 × 985 mm
Net Weight	90 kg
INSTALLATION
Minimum Room Area Required	34.0 m²
Clearance – Sides	700 mm minimum
Clearance – Front	2500 mm minimum
Clearance – Top	500 mm minimum
Mounting	Concrete base or brackets
Pool Distance Requirement	3500 mm minimum
SMART FEATURES
WiFi Connectivity	Yes (Built-in)
Remote Control Compatible	Yes (Optional accessory)
Operating Modes	Heat Only / Heat-Cool / Cool Only / Auto
Control Modes	Boost / Whisper
Pump Synchronisation	P1/P2 Terminals
WARRANTY & COMPLIANCE
Manufacturer’s Warranty	5 Years (Parts & Labour)
Warranty Type	On-Site
Design Origin	UK (Dantherm)
Climate Optimised	UK Weather Conditions
F-Gas Compliant	Yes

💧 Hot Tub & Spa Pool Sizing Guide

How to Choose the Right Heat Pump Capacity

The I-PAC 22 with its 22kW output is ideally suited for:

✅ Large Hot Tubs: 3,000 – 5,000 litres
✅ Swim Spas: Small to medium-sized
✅ Plunge Pools: Up to 25m² surface area
✅ Commercial Spas: Multiple-person capacity
✅ Cold Climate Installations: Where additional power compensates for heat loss

Factors Affecting Heat Pump Selection:

🌡️ Climate Zone – Colder regions require higher capacity
🏊 Pool/Spa Volume – Larger water volumes need more heating power
🛡️ Insulation Quality – Well-insulated vessels retain heat better
🌬️ Exposure – Sheltered locations reduce heat loss
⏰ Usage Pattern – Continuous vs occasional use affects requirements
📏 Cover Usage – Insulated covers dramatically reduce heating demands

Important Note: For optimal efficiency, always use an insulated thermal cover when your hot tub is not in use. This single measure can reduce heating costs by 50-70%.

⏱️ Estimated Heat-Up Times

Understanding how long it takes to heat your water helps you plan usage and manage expectations.

Heat-Up Time Calculation Formula

Time (hours) = (Water Volume in m³ × Temperature Rise in °C × 1.16) ÷ Heat Pump kW Rating

Estimated Heat-Up Times for I-PAC 22 (22kW Output)

Small Hot Tub (1,500 litres / 1.5 m³)

Temperature Rise	Starting Temp	Target Temp	Estimated Time
5°C	15°C → 20°C	20°C	0.4 hours (24 min)
10°C	10°C → 20°C	20°C	0.8 hours (47 min)
15°C	10°C → 25°C	25°C	1.2 hours (1h 11min)
20°C	10°C → 30°C	30°C	1.6 hours (1h 35min)
25°C	10°C → 35°C	35°C	2.0 hours (1h 59min)

Medium Hot Tub (2,500 litres / 2.5 m³)

Temperature Rise	Starting Temp	Target Temp	Estimated Time
5°C	15°C → 20°C	20°C	0.7 hours (40 min)
10°C	10°C → 20°C	20°C	1.3 hours (1h 19min)
15°C	10°C → 25°C	25°C	2.0 hours (1h 59min)
20°C	10°C → 30°C	30°C	2.6 hours (2h 39min)
25°C	10°C → 35°C	35°C	3.3 hours (3h 18min)

Large Hot Tub (4,000 litres / 4.0 m³)

Temperature Rise	Starting Temp	Target Temp	Estimated Time
5°C	15°C → 20°C	20°C	1.1 hours (1h 4min)
10°C	10°C → 20°C	20°C	2.1 hours (2h 6min)
15°C	10°C → 25°C	25°C	3.2 hours (3h 10min)
20°C	10°C → 30°C	30°C	4.2 hours (4h 14min)
25°C	10°C → 35°C	35°C	5.3 hours (5h 17min)

Swim Spa (8,000 litres / 8.0 m³)

Temperature Rise	Starting Temp	Target Temp	Estimated Time
5°C	15°C → 20°C	20°C	2.1 hours (2h 7min)
10°C	10°C → 20°C	20°C	4.2 hours (4h 14min)
15°C	10°C → 25°C	25°C	6.3 hours (6h 20min)
20°C	10°C → 30°C	30°C	8.4 hours (8h 27min)
25°C	10°C → 35°C	35°C	10.5 hours (10h 34min)

⚠️ Important Disclaimers:

These heat-up times are estimates only and assume:

• Ideal ambient conditions (15-27°C air temperature)
• Heat pump operating in Boost mode at maximum capacity
• No heat loss during heating (cover in place)
• Clean filter and optimal water flow
• Heat pump operating at peak efficiency

Actual heating times may vary based on:

• Ambient air temperature
• Wind exposure
• Starting water temperature
• Cover usage during heating
• Heat pump age and condition
• Water flow rate
• System cleanliness

For precise calculations specific to your installation, consult with your installer or contact technical support.

💰 Running Cost Comparison

How the I-PAC 22 Saves You Money

Comparing the I-PAC 22 inverter heat pump against alternative heating methods reveals substantial long-term savings:

Annual Running Cost Estimates (Typical UK Hot Tub)

Assumptions: 2,500-litre hot tub, maintained at 35°C, May-September season (20 weeks), electricity at £0.30/kWh, gas at £0.10/kWh

Heating Method	Efficiency	Annual Cost	vs I-PAC 22
I-PAC 22 Inverter HP	COP 9.6 average	£156	Baseline
Traditional On/Off HP	COP 5.0 average	£299	+£143 (92% more)
Electric Heater	100%	£1,500	+£1,344 (862% more)
Gas Heater	85% efficiency	£453	+£297 (190% more)

Annual Savings:

• vs Traditional Heat Pump: Save approximately £143 per year
• vs Electric Heater: Save approximately £1,344 per year
• vs Gas Heater: Save approximately £297 per year

5-Year Total Savings:

• vs Traditional Heat Pump: £715
• vs Electric Heater: £6,720
• vs Gas Heater: £1,485

The I-PAC 22 typically pays for itself through energy savings within 3-5 years compared to electric heating, or 4-6 years compared to traditional heat pumps.

Additional Cost Benefits:

💡 Lower Maintenance Costs – Fewer on/off cycles mean less wear on components
💡 Reduced Electrical Infrastructure – No inrush current spikes requiring upgraded electrical panels
💡 Extended Equipment Life – Gentle operation prolongs compressor and component lifespan
💡 Future-Proof Investment – F-Gas compliant R32 refrigerant ensures long-term serviceability

🌍 Environmental Benefits

Eco-Friendly Heating You Can Feel Good About

🌱 Low Carbon Footprint
The I-PAC 22 extracts free renewable energy from ambient air, converting it into heat with exceptional efficiency. For every kW of electricity consumed, up to 13.8 kW of heating is delivered—dramatically reducing your carbon emissions.

🌱 Environmentally Responsible Refrigerant
R32 refrigerant offers:

• GWP of 675 (vs 2,088 for older R410A)
• Zero Ozone Depletion Potential (ODP)
• F-Gas compliant through 2025 phase-down requirements
• Easier to recycle and reuse at end of life

🌱 Reduced Energy Demand
By operating at an average COP of 9.6, the I-PAC 22 substantially reduces grid electricity demand, supporting UK renewable energy transition goals.

🌱 Silent Operation Protects Wildlife
Ultra-quiet Whisper mode (24.9 dB at 10m) ensures your heating doesn’t disturb local wildlife or create noise pollution.

🏗️ Installation Requirements

What You Need to Know Before Installing

Electrical Requirements

✅ Power Supply: 230V single-phase, 50Hz
✅ Circuit Protection: 25A Type C MCB or aM fuse
✅ Earth Leakage Protection: 30mA Type F RCD (dedicated to heat pump only)
✅ Isolation: All-pole isolator within 2m and in line of sight
✅ Voltage Tolerance: 207-253V (must be maintained during compressor start)
✅ Supply Cable: Appropriate rating for 20A maximum current

Important: All electrical work must comply with BS7671 (18th Edition Wiring Regulations) and be completed by a qualified electrician.

Plumbing Requirements

✅ Water Connections: 1½” or 50mm female fittings
✅ Flow Rate: 10-12 m³/hour recommended
✅ Bypass Valve: Mandatory for flow control
✅ Isolation Valves: Required on inlet and outlet
✅ Non-Return Valve: Prevents backflow
✅ Anti-Return Loop: 100mm above heat pump outlet (if sanitiser fitted)
✅ Drainage: Condensate drain kit must connect to waste or soakaway

Physical Installation

✅ Mounting Surface: Solid concrete base or corrosion-proof mounting brackets
✅ Fixing Method: M10 bolts (provided)
✅ Minimum Clearances:

• Sides: 700mm
• Front (airflow): 2500mm
• Top: 500mm
• Pool edge: 3500mm (electrical safety regulation)

✅ Ventilation: Must be in well-ventilated area—enclosed spaces prohibited
✅ Minimum Room Area: 34.0 m² (if installed in enclosed structure)
✅ Airflow: Inlet and outlet must not be obstructed; air must not recirculate

Water Chemistry Requirements

Maintaining proper water chemistry is essential for warranty coverage and heat pump longevity:

Parameter	Required Range
pH Level	7.2 – 7.8
Total Alkalinity (CaCO₃)	80 – 120 ppm
Total Hardness (CaCO₃)	150 – 250 ppm
Total Dissolved Solids	Max 1,000 ppm
Free Chlorine (Domestic)	1 – 2 ppm
Free Chlorine (Commercial)	3 – 6 ppm
Superchlorination	Max 30 ppm for 24 hours
Bromine	2 – 5 ppm
Baquacil	25 – 50 ppm
Ozone	Max 0.9 ppm
Copper Content	Max 1 ppm
Aquamatic Ionic Purifier	Max 2 ppm
Maximum Salt Content	35,000 ppm

⚠️ Failure to maintain water chemistry within these parameters will void warranty coverage.

Optional Features Installation

Remote Control Panel Kit

• Allows indoor wall-mounting of controller
• 10m extension cable included
• Perfect when heat pump is mounted where built-in controls are inaccessible

Winter Protection Cover

• Custom-fit ventilated cover
• Protects unit during off-season storage
• Does not replace proper winterization procedure

🎯 Top 7 Standout Features

1. 🔄 Stepless DC Inverter Compressor

Unlike traditional heat pumps that operate in simple on/off mode, the I-PAC 22’s advanced DC inverter compressor adjusts its speed infinitely between 20-100% capacity. This means the heat pump always operates at exactly the right power level for current conditions—no wasted energy, no temperature overshooting, no unnecessary cycling.

Your Benefit: Lower bills, precise temperatures, longer equipment life

2. ⚡ Electronic Expansion Valve (EEV) Technology

The I-PAC 22 uses sophisticated EEV technology to precisely control refrigerant flow through the system. This optimizes the refrigeration cycle in real-time based on ambient conditions, maintaining peak efficiency across the entire operating range.

Your Benefit: Consistent performance regardless of outdoor temperature

3. 🌀 Rapid Reverse-Cycle Defrosting

When operating in cold conditions, frost can build up on the evaporator coil, reducing efficiency. The I-PAC 22’s intelligent 4-way valve system enables lightning-fast defrost cycles that clear ice buildup in minutes—not the hours required by traditional systems.

Your Benefit: Minimal heating interruption, extended cold-weather operation

4. 💎 High-Efficiency Twisted Titanium Heat Exchanger

The pool water flows through a premium titanium heat exchanger with a unique twisted tube design that maximizes heat transfer surface area. Titanium offers exceptional corrosion resistance, even in chemically treated water or saltwater pools.

Your Benefit: Superior durability, excellent heat transfer, compatible with all sanitization systems

5. 🛡️ Comprehensive Safety Protection System

Multiple layers of protection safeguard both the heat pump and your electrical system:

• High pressure and low pressure protection
• Compressor overheat protection
• Flow detection (E3/E6 codes prevent dry running)
• Phase rotation protection (three-phase models)
• Voltage range monitoring

Your Benefit: Peace of mind, protected investment, safe operation

6. 🚀 Soft Start Technology

When the compressor starts, it gradually ramps up to operating speed rather than demanding full current instantly. This “soft start” eliminates the massive 200-300% inrush current spike typical of traditional heat pumps.

Your Benefit: No tripped breakers, compatible with smaller electrical supplies, reduced stress on electrical infrastructure

7. 📱 Integrated WiFi Control with Smart Scheduling

The built-in WiFi module connects your heat pump to your home network, enabling full remote control through the dedicated smartphone app. Set schedules, monitor real-time performance data, receive maintenance alerts, and adjust settings from anywhere.

Your Benefit: Convenience, energy management, proactive maintenance, hot tub ready when you are

❓ Frequently Asked Questions

Q1: How quiet is the I-PAC 22 heat pump in real-world use?

A: The I-PAC 22 is exceptionally quiet, especially in Whisper mode. At 10 metres distance, it produces just 24.9-36.7 dB(A) depending on operating intensity. In Whisper mode specifically, noise levels drop an additional 3 dB(A). To put this in perspective:

• 20 dB(A) = Rustling leaves
• 30 dB(A) = Whisper
• 40 dB(A) = Quiet library

Even in Boost mode at maximum output, the I-PAC 22 is 9-11 dB(A) quieter than traditional on/off heat pumps. Most users report that background garden sounds (birds, wind, distant traffic) mask the heat pump entirely in Whisper mode. Neighbors are unlikely to hear it operating.

Q2: What’s the difference between Boost and Whisper modes, and when should I use each?

A: The two modes serve different purposes:

Boost Mode:

• Operates from 20-100% capacity
• Use for initial heat-up after filling your hot tub
• Use when recovering from significantly lower temperatures
• Use in colder weather when maximum output is needed
• Provides fastest possible heating

Whisper Mode:

• Operates from 20-80% capacity
• Use for daily temperature maintenance
• Use overnight when noise is a concern
• Use in residential areas close to neighbours
• Provides 3 dB(A) quieter operation while maintaining excellent efficiency

Pro Tip: Start with Boost mode to heat your hot tub initially, then switch to Whisper mode for ongoing temperature maintenance. The heat pump will automatically adjust within the mode’s capacity range.

Q3: How much will the I-PAC 22 cost to run compared to my current heating method?

A: Running costs depend on several factors (climate, hot tub size, desired temperature, usage pattern, local electricity rates), but here are representative examples:

For a typical 2,500-litre hot tub maintained at 35°C during UK summer (May-September), with electricity at £0.30/kWh:

• I-PAC 22 (COP 9.6): Approximately £156 annually
• Traditional heat pump (COP 5.0): Approximately £299 annually
• 3kW electric heater: Approximately £1,500 annually

This means the I-PAC 22 can save:

• £143/year vs traditional heat pumps
• £1,344/year vs electric heaters

Over the heat pump’s expected 10-15 year lifespan, these savings amount to thousands of pounds. Many owners find the I-PAC 22 pays for itself through energy savings alone within 3-5 years when replacing electric heating.

Energy Saving Tip: Use an insulated hot tub cover whenever the tub isn’t in use. This single measure can reduce heating costs by 50-70%.

Q4: What size hot tub or pool is the I-PAC 22 suitable for?

A: The I-PAC 22 with its 22kW output is ideally suited for:

✅ Large Hot Tubs: 3,000-5,000 litres
✅ Small Swim Spas: Up to 8,000 litres
✅ Plunge Pools: Up to 25m² surface area
✅ Commercial Spas: Multi-person capacity

The “right” size depends on several factors beyond just volume:

• Climate: Colder regions need more heating capacity
• Insulation: Well-insulated vessels require less power
• Exposure: Sheltered locations lose less heat
• Desired temperature: Higher temperatures increase heating demand
• Usage pattern: Continuous vs occasional use affects requirements

Sizing Rule of Thumb: For UK climate and hot tub use (maintaining 35-38°C), allow approximately 1kW of heating capacity per 200-250 litres of water volume. The I-PAC 22 at 22kW therefore comfortably serves hot tubs up to 4,400-5,500 litres.

For precise sizing recommendations, consult the pool sizing charts in the technical brochure or contact your installer.

Q5: Can the I-PAC 22 operate in cold weather, and what’s the lowest temperature it will work at?

A: Yes, the I-PAC 22 (X-range) operates down to -5°C ambient air temperature. This extended range makes it suitable for spring and autumn use in the UK, where morning temperatures may dip below freezing.

Performance at Different Temperatures:

• At 27°C air: 25.0 kW output (peak efficiency)
• At 15°C air: 17.0 kW output (still excellent performance)
• Below 15°C: Output gradually reduces but remains functional to -5°C

Important Notes:

• Performance naturally reduces as air temperature drops (less heat energy available in cold air)
• The heat pump includes automatic defrost cycles to maintain efficiency in cold weather
• The unit should never be operated below -5°C (X-range) as this risks damage
• Proper winterization is essential if temperatures will drop below operating limits

For even lower temperature operation (-10°C to 43°C), consider the I-PAC+ Y-range models.

Q6: Is professional installation required, or can I install the I-PAC 22 myself?

A: Professional installation by qualified technicians is strongly recommended and may be required for warranty coverage. While mechanically capable homeowners can potentially handle some aspects, several factors make professional installation advisable:

Electrical Work:

• Legally Required: All electrical work must comply with BS7671 (18th Edition Wiring Regulations)
• Building Control: New circuits require Part P notification or certified electrician
• Competency: Work must be done by a qualified person under UK law
• Safety: Incorrect electrical installation poses serious safety risks

Refrigeration Work:

• F-Gas Regulations: Any work on refrigeration circuits requires F-Gas registration
• Illegal Activity: Unauthorized venting of refrigerant is a criminal offense
• Specialist Knowledge: Refrigeration work requires specialized training and equipment

Warranty Protection:

• Many manufacturers require professional installation for warranty validity
• Improper installation voids warranty coverage
• Documented professional installation provides proof of compliance

What You Can Do Yourself:

• Site preparation (concrete pad, clearances)
• Basic plumbing preparation (if competent)
• Lifting and positioning the unit

What Requires Professionals:

• All electrical connections and testing
• Final plumbing connections and commissioning
• System testing and adjustment
• Any refrigeration work (if required)

Cost Perspective: Professional installation typically adds £300-600 to project cost but provides peace of mind, warranty protection, compliance with regulations, and optimal performance. This is a wise investment given the heat pump’s £3,000-4,000 value.

Q7: What maintenance does the I-PAC 22 require, and how often?

A: The I-PAC 22 requires relatively minimal maintenance, but regular attention ensures optimal performance and longevity:

Monthly Maintenance (Owner): ✅ Visual inspection for debris or obstruction around air inlets/outlets
✅ Check condensate drain is flowing freely
✅ Verify water chemistry is within specified ranges
✅ Clean pre-filter on pool pump (improves flow)
✅ Listen for unusual noises during operation

Seasonal Maintenance (Owner): ✅ Clean evaporator coil fins with soft brush (power OFF)
✅ Check all electrical connections for tightness
✅ Inspect for signs of refrigerant leakage (oily residue)
✅ Test operation in both Boost and Whisper modes
✅ Verify WiFi connectivity and controller operation

Annual Maintenance (Professional Technician): ✅ Refrigerant level check and adjustment if needed
✅ Compressor oil inspection (if applicable)
✅ Electrical system testing (voltage, current, earthing)
✅ Titanium heat exchanger inspection for scale/corrosion
✅ Fan motor bearing lubrication (if required)
✅ Complete system performance test
✅ Firmware updates (if available)

Winterization Procedure: If the heat pump will be exposed to temperatures below -5°C for extended periods, proper winterization is mandatory:

1. Isolate electrical supply and remove fuses
2. Drain all water from heat exchanger completely
3. Flush with clean tap water (not pool water)
4. Spray electrical components with moisture-repellent (WD-40)
5. Cover with ventilated winter cover (not plastic sheeting)

Failure to winterize properly can result in frost damage and voided warranty.

Maintenance Cost Estimate: Budget approximately £100-150 annually for professional servicing, plus minimal owner maintenance time. This investment protects your £3,000+ heat pump and maintains efficiency.

Q8: How long will the I-PAC 22 last, and what warranty coverage is included?

A: With proper installation, maintenance, and water chemistry control, the I-PAC 22 should provide 10-15 years of reliable service. Many factors influence lifespan:

Factors Extending Lifespan: ✅ Proper water chemistry maintenance
✅ Regular professional servicing
✅ Correct winterization when not in use
✅ Operation within specified parameters
✅ Quality electrical supply (stable voltage)
✅ Adequate ventilation and airflow
✅ Use of insulated cover (reduces runtime)

Factors Reducing Lifespan: ❌ Poor water chemistry (accelerates corrosion)
❌ Operating outside temperature limits
❌ Neglected maintenance
❌ Inadequate water flow
❌ Improper winterization
❌ Electrical supply issues
❌ Obstruction of airflow

Warranty Coverage: The I-PAC 22 includes a comprehensive 5-year manufacturer’s warranty covering:

• Parts: All components covered against manufacturing defects
• Labour: Professional repair or replacement labour included
• On-site service: Technician visits your location (no depot returns)

Warranty Conditions: To maintain warranty coverage, you must:

• Have the heat pump professionally installed
• Maintain water chemistry within specified parameters
• Perform proper winterization if required
• Not modify or tamper with internal components
• Register the product within 30 days of installation
• Retain proof of installation date

Component Reliability:

• Compressor: Typically 10-12 years (heart of the system)
• Titanium heat exchanger: 15+ years (highly corrosion resistant)
• Fan motor: 8-12 years
• Electronic controls: 10-15 years
• Refrigerant circuit: 15+ years (sealed system)

Long-Term Value: Even accounting for potential repairs after warranty expires, the I-PAC 22’s energy savings typically result in positive return on investment over 10+ year lifespan compared to alternative heating methods.

Q9: Will the I-PAC 22 work with my pool/spa sanitization system?

A: Yes! The I-PAC 22’s titanium heat exchanger is compatible with virtually all pool and spa sanitization systems, including:

✅ Chlorine (sodium hypochlorite, calcium hypochlorite, trichlor, dichlor)
✅ Bromine
✅ Saltwater chlorination systems
✅ Baquacil (biguanide)
✅ Ozone systems
✅ UV sanitization
✅ Mineral systems
✅ Ionic purification systems
✅ Combination systems

Why Titanium Matters: The twisted titanium heat exchanger resists corrosion from all common sanitizers. Lesser heat pumps using copper, cupronickel, or stainless steel can corrode when exposed to certain chemicals or high salt levels.

Important Requirements: While compatible with all sanitizers, you must maintain chemical levels within specified ranges:

• Free chlorine: 1-2 ppm (domestic) or 3-6 ppm (commercial)
• Salt: Maximum 35,000 ppm
• pH: 7.2-7.8
• Total alkalinity: 80-120 ppm
• Copper content: Maximum 1 ppm

Superchlorination: The heat pump can tolerate shock treatments (superchlorination) up to 30 ppm free chlorine for a maximum of 24 hours. Do not run the heat pump during shock treatment—wait until chlorine drops below 10 ppm.

Anti-Return Loop Required: If using a chemical dosing system or sanitizer, install an anti-return loop (100mm above heat pump outlet) to prevent backflow of treated water during shutdown. This is shown in the installation manual.

Water Quality = Longevity: Maintaining proper water chemistry isn’t just about sanitization—it’s essential for protecting your heat pump investment and maintaining warranty coverage.

Q10: Can I control the I-PAC 22 from my smartphone, and how does the WiFi feature work?

A: Yes! The I-PAC 22 includes built-in WiFi connectivity that puts complete control in your pocket:

Setup Process:

1. Download the dedicated app (Android or iOS)
2. Create a user account
3. Press the WiFi button on heat pump controller for 3 seconds
4. Connect to your home WiFi network through the app
5. Add the heat pump to your “family” of devices

Setup Time: Approximately 5-10 minutes for initial configuration

App Features:

📱 Remote Control:

• Power on/off
• Adjust target temperature
• Switch between Heat/Cool/Auto modes
• Toggle Boost/Whisper modes
• View current pool/spa temperature
• Access timer functions

📱 Monitoring:

• Real-time operating status
• Current water temperature
• Ambient air temperature (if applicable)
• Error codes and diagnostics
• Operating mode confirmation

📱 Scheduling:

• Set daily or weekly heating schedules
• Different schedules for weekdays/weekends
• Vacation mode for extended absences
• Automatic temperature adjustments

📱 Multi-User Access:

• Share control with family members
• Administrator and user permission levels
• Manage multiple heat pumps (if you have more than one)

Internet Connection Required: The heat pump connects to your home WiFi router, which must have internet access for remote control from outside your home. Local network control (when you’re home) works even without internet.

Range Limitations: WiFi connectivity requires the heat pump to be within range of your wireless router (typically 15-30 metres depending on construction). For installations beyond WiFi range, consider:

• WiFi range extender
• Running ethernet cable to access point near heat pump
• Optional remote control panel with physical cable connection

Security:

• Encrypted communications protect your data
• Password-protected account access
• No third-party data sharing

Alternative Control: If you don’t want to use WiFi, the heat pump functions perfectly using the built-in touchscreen controller or optional wired remote control panel. WiFi is a convenience feature, not a requirement.

Q11: What happens if there’s a power cut? Will I need to reset everything?

A: The I-PAC 22 handles power interruptions intelligently with minimal user intervention required:

Automatic Recovery Features:

🔄 Memory Retention:

• All temperature settings are preserved during power cuts
• Operating mode (Heat/Cool/Auto) is remembered
• Boost/Whisper mode selection is saved
• Timer schedules are retained
• WiFi configuration remains stored

🔄 Automatic Restart: When power is restored, the heat pump will automatically resume operation in the same mode it was operating before the power cut. There’s no need to manually restart the system.

Safety Delay: After power restoration, the compressor will not immediately start. The heat pump includes protective time delays to prevent:

• Damage from rapid on/off cycling
• Excessive inrush current
• Compressor lubrication issues

What You’ll Notice:

1. Power returns
2. Fan runs for approximately 1 minute
3. Compressor starts gradually after time delay expires
4. Normal operation resumes

⚠️ Important Safety Note: The automatic restart feature means the heat pump may start without warning when power is restored. This is normal operation. Keep this in mind if performing maintenance or working near the unit.

Extended Power Cuts: If power is lost for several hours or days:

• Water temperature will gradually drop to ambient
• When power returns, the heat pump will resume heating automatically
• Initial heat-up time will depend on how much temperature was lost
• Use Boost mode to accelerate recovery if needed

Electrical Storms: During thunderstorms, it’s advisable (though not essential) to:

• Switch off the heat pump at the main isolator
• This protects electronics from potential lightning-induced power surges
• Standard surge protection is built-in, but direct lightning strikes can overwhelm any protection

Power Supply Issues: The heat pump monitors incoming voltage and will display protection code E5 if voltage is outside the acceptable range (207-253V for single-phase). This protects the compressor from damage due to brownouts or voltage fluctuations.

Q12: What do I need to know about winterization, and is it really necessary?

A: Winterization is absolutely essential if your heat pump will be exposed to temperatures below -5°C (X-range models) or if you won’t be using your hot tub for an extended period during cold weather. Failure to winterize properly can result in catastrophic frost damage costing thousands of pounds in repairs—none of which would be covered by warranty.

Why Winterization is Critical:

• Water trapped in the heat exchanger expands when frozen
• Ice formation can split the titanium tubes or rupture connections
• Frost damage is often not immediately visible but manifests as leaks later
• A single night of hard frost can destroy an unwinterized heat pump
• Warranty specifically excludes frost damage from improper winterization

When to Winterize: You must winterize if any of these conditions apply: ✅ You won’t use your hot tub for more than 2 weeks during winter
✅ Ambient temperatures may drop below -5°C
✅ You’re concerned about power cuts causing loss of heating
✅ Your hot tub/pool will be drained for maintenance or repairs
✅ You’re shutting down for the season

Winterization Procedure:

Step 1: Electrical Isolation

• Switch off main isolator
• Remove fuses and store safely away from heat pump
• This prevents accidental operation

Step 2: Water Drainage

• Turn off pool/spa circulation pump
• Disconnect inlet and outlet water pipes OR open drain valve
• Remove condensate drain cover inside unit
• Allow all water to drain completely (15-30 minutes)

Step 3: Flushing

• Connect garden hose to outlet connection
• Flush through with CLEAN TAP WATER (not pool water) for 10+ minutes
• Use spray nozzle if available for thorough flushing
• This removes any chemically-treated water that could corrode internal parts

Step 4: Electrical Protection

• Remove electrical enclosure cover (see installation manual)
• Liberally spray all interior components with moisture-repellent aerosol (WD-40 or similar)
• This prevents corrosion during storage
• Replace enclosure cover

Step 5: Water Connection Protection

• Fit plastic bags over water inlet and outlet connections
• Secure with elastic bands
• This prevents debris entering and reminds you the unit is winterized

Step 6: Weather Protection

• Cover unit with VENTILATED winter cover (optional accessory available)
• DO NOT use plastic sheeting—condensation inside plastic can cause corrosion
• Ensure cover allows air circulation
• Secure cover against wind

Common Winterization Mistakes to Avoid: ❌ Not draining completely (any water left can freeze)
❌ Using pool water for final flush (chemicals corrode internals)
❌ Covering with non-breathable plastic (traps moisture)
❌ Failing to spray electrics with moisture repellent
❌ Not removing and storing fuses separately
❌ Assuming the condensate in the base pan will drain naturally

De-Winterization (Spring Start-Up):

When you’re ready to use the heat pump again:

1. Remove weather cover
2. Remove plastic bags from water connections
3. Reconnect water inlet and outlet pipes
4. Start circulation pump and run for 15+ minutes
   • This purges air from system
   • Check for leaks at connections
5. Replace fuses in electrical system
6. Switch on main isolator
7. Power on heat pump
8. Set desired temperature
9. Check daily that water chemistry is correct

Time Required:

• Winterization: 30-45 minutes
• De-winterization: 20-30 minutes

Professional Service: If you’re uncomfortable performing winterization yourself, most pool service companies offer this as a seasonal service for £50-100. Given the thousands of pounds at risk, this is excellent insurance.

Alternative to Full Winterization: If you plan to continue using your hot tub in winter and ambient temperatures remain above -5°C:

• Maintain normal water circulation 24/7
• Use insulated cover when not in use
• Monitor weather forecasts for extreme cold events
• Have winterization materials ready in case of extended power cuts

Remember: One hard frost is all it takes to destroy an unwinterized heat pump. Don’t risk it!

🛠️ What’s Included in the Box

When your I-PAC 22 arrives, you’ll find:

✅ I-PAC 22 Heat Pump Unit – Fully assembled and factory tested
✅ Water Union Connectors – 2 × 1½” and 2 × 50mm adapters
✅ Rubber Mounting Feet – Set of 4 for vibration damping
✅ Condensate Drainage Kit – Adapter and hose for moisture removal
✅ Installation Manual – Comprehensive 43-page guide
✅ Warranty Registration Card – Register within 30 days for full coverage

Not Included (Required Separately):

• M10 mounting bolts (for securing to concrete base/brackets)
• Pool water pipework and fittings
• Electrical supply cable and protection devices
• Bypass valve and isolation valves
• Anti-return loop components (if chemical dosing used)

Optional Accessories (Sold Separately):

• Remote control panel kit with 10m cable
• Winter protection cover
• Extended warranty plans

🎁 Why Buy the I-PAC 22 from Parts4Tubs?

✅ Authorized Dantherm Dealer – Genuine products, full manufacturer warranty
✅ Expert Technical Support – Our team understands heat pumps inside and out
✅ Competitive Pricing – Best value without compromising quality
✅ Fast Delivery – Quick dispatch on in-stock items
✅ Installation Support – We can recommend qualified installers in your area
✅ Comprehensive Documentation – All manuals and technical resources provided
✅ After-Sales Care – Ongoing support throughout ownership

🚀 Transform Your Hot Tub Experience Today

The I-PAC 22 inverter heat pump represents the ultimate in pool and spa heating technology—combining whisper-quiet operation, exceptional energy efficiency, intelligent controls, and robust construction into one premium package.

Key Reasons to Choose the I-PAC 22:

💚 Eco-Friendly – R32 refrigerant with low environmental impact
💰 Cost-Effective – Save up to £1,344 annually vs electric heating
🔇 Ultra-Quiet – 9-11 dB(A) quieter than traditional heat pumps
📱 Smart Control – WiFi connectivity for control from anywhere
🛡️ Peace of Mind – 5-year comprehensive warranty included
🏆 UK-Designed – Engineered specifically for British climate conditions
⚡ Powerful – 22kW output for rapid heating when you need it
🌡️ Versatile – Heat, cool, or auto modes for year-round comfort

Perfect For:

• Large hot tubs (3,000-5,000 litres)
• Small swim spas
• Plunge pools up to 25m²
• Commercial spa installations
• Cold climate locations requiring extra capacity
• Noise-sensitive residential areas
• Energy-conscious homeowners
• Anyone wanting the best technology available

Whether you’re installing a new hot tub or upgrading from an inefficient electric heater or aging heat pump, the I-PAC 22 delivers the performance, efficiency, and reliability you deserve.

Your hot tub should be a source of relaxation—not frustration from slow heating, high bills, or intrusive noise. The I-PAC 22 solves all these problems while future-proofing your investment with industry-leading technology.

Make the smart choice. Invest in quality, efficiency, and peace of mind with the I-PAC 22 inverter heat pump.